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Punnett square

Punnett Squares (7th grade)

cross Represents the combining of male and female sex cells in Punnett squares. (When parents produce offspring.)
dominant Describes a gene that is always expressed because it masks the other gene; represented by a capital letter.
genotype The genetic code of an organism - represented by two letters.
heredity The passing of traits from one generation to the next by means of genes.
phenotype The physical appearance of an organism (based on its genotype).
Punnett square A genetic tool to solve genetics problems mathematically.
recessive Describes the gene that can be masked by a dominant gene; represented by a lower case letter. The recessive trait only appears when both genes are recessive.
trait A distinguishing characteristic based on your genes (such as eye color or hair color).
hybrid A genotype with 1 dominant and 1 recessive gene (like Tt or Bb)
purebred A genotype with 2 dominant or 2 recessive genes (like BB or bb or HH or hh) also known as HOMOZYGOUS
probability The chance or likelihood of something occurring.
Homozygous Genotype with 2 dominant or 2 recessive genes for a trait: like TT or bb
heterozygous genotype with one dominant and one recessive gene for a trait: like Tt, Bb or Rr.-also known as hybrid
Created by: Mrs. Corey



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